C / C++ / MFC

25-Apr-06 13:44

You guys have been a big help with my previous question, I have another.

I have input file "input.txt"
i have outputfile "output.txt"

input.txt will always look like
A 1 5 4
B 2 6 3

the first value can be a different, but will always be one char in length.

I want to grab each value on the first and second line and assign variables to them.

i've looked a lot about inFile.get or .getline or .peek, but it's not making a whole lot of sense.

I have this:

ifstream inf;
ofstream outf1;
ofstream outf2;

inf.open(argv[1], ios::in);
outf1.open(argv[2], ios::in);
outf2.open(argv[2], ios::out);

char n, x, y, z;
while(!inf.eof())
inf.get >> n >> x >> y >> z;

Can anyone shed any light?

Thanks,
Ed

Stephen Hewitt25-Apr-06 13:52

25-Apr-06 13:52

Reading a char doesn't skip white space and you don't need the get. Try this:

inf >> n >> ws >> x  >> ws >> y  >> ws >> z  >> ws;

The ws manipulator can be used to explicitly skip white space.

Steve

etm12425-Apr-06 13:56

25-Apr-06 13:56

i tried something like that, but i get this error:

error C2475: 'std::basic_istream<_Elem,_Traits>::get' : forming a pointer-to-member requires explicit use of the address-of operator ('&') and a qualified name
with
[
_Elem=char,
_Traits=std::char_traits<char>
]
error C2475: 'std::basic_istream<_Elem,_Traits>::get' : forming a pointer-to-member requires explicit use of the address-of operator ('&') and a qualified name
with
[
_Elem=char,
_Traits=std::char_traits<char>
]
warning C4552: '>>' : operator has no effect; expected operator with side-effect

Stephen Hewitt25-Apr-06 14:05

25-Apr-06 14:05

I was wrong about the fact that reading a char doesn't skip white space. I used the following test program and was able to read in data like yours however:
-----
// Console.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <fstream>
#include <iostream>
using namespace std;

int main(int argc, char* argv[])
{
ifstream in("C:\\a.txt");
char n, a, b, c;
while (in >> n >> a >> b >> c)
{
cout << n << " " << a << " " << b << " " << c << endl;
}

return 0;
}

Steve

etm12425-Apr-06 14:09

25-Apr-06 14:09

worked like a charm, Steve.

Thank you!

etm12425-Apr-06 14:13

25-Apr-06 14:13

Steve, one last quick one, if I have two lines, how would I handle that?

my input file reads:

A 1 2 3
B 4 5 6

Stephen Hewitt25-Apr-06 14:20

25-Apr-06 14:20

It should work with multiple lines. It will work with or without multiple lines. If reads the 1st character into n and the 2d, 3rd and 4th into a, b, c, respectively. Then it repeats the process. What exactly do you want to do with the data?

Steve

etm12425-Apr-06 14:22

25-Apr-06 14:22

i came up with this...
char n, x, y, z, n2, x2, y2, z2;
while(!inf.eof())
inf >> n >> x >> y >> z >> n2 >> x2 >> y2 >> z2;

but was just seeing if there was a more efficient way of grabbing it.

in the large scheme of things, I am reading in this values:

A 1 5 7
B 2 4 5

which are actually points on a grid. so they are A(1,5,7) and B(2,4,5). Now I use those values and plug them into my class to do calculations. I never really worked with the ifstream much and i thank you again for your assistance!

-Ed

Stephen Hewitt25-Apr-06 14:26

25-Apr-06 14:26

Can you show the code which plugs the data into your class?

Steve

etm12425-Apr-06 14:28

25-Apr-06 14:28

im messing with that right now, but I can show you what I have so far...

int main(int argc, char* argv[])
{

ifstream inf;
ofstream outf1;
ofstream outf2;

inf.open("input.txt", ios::in);
outf1.open("output.txt", ios::in);
outf1.close();
outf2.open("output.txt", ios::out);

char n, x, y, z, n2, x2, y2, z2;
while(!inf.eof())
inf >> n >> x >> y >> z >> n2 >> x2 >> y2 >> z2;

Point p0;
Point p1(x,y,n);
Point3D p1(z);
p1.printP();

Point p2(x2,y2,n2);
Point3D p2(z3);
p2.printP();

system("pause");

/* inf.close();
outf2.close();
return 0;*/

}

I am working on a piece that exhibits inheritance. Basically Point class is already defined. I am inheriting it into Point3D class. I am getting my values from the input file, computing the distance between the points, then outputing to an output file.

etm12425-Apr-06 14:36

25-Apr-06 14:36

I obviously can't pass char into my functions, i need to convert my input variables into integers. I was playing around with the int function, but I think that is giving me the ascii value. How can I make

char "1" = int 1

Stephen Hewitt25-Apr-06 14:47

25-Apr-06 14:47

There are problems with this code: you have 2 variables called "p1" and 2 called "p2".
Anyway here how I'd read in a list of points:
----

// Console.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <fstream>
#include <iostream>
#include <vector>
#include <string>
using namespace std;

// Our point structure.
class My3DPoint
{
public:
My3DPoint() : x(0), y(0), z(0) {}
My3DPoint(int _x, int _y, int _z) : x(_x), y(_y), z(_z) {}
int x, y, z;
};

// A collection of "My3DPoint"s.
typedef vector<My3DPoint> My3DPoints;

int main(int argc, char* argv[])
{
ifstream in("C:\\a.txt");

My3DPoints points;

string label;
int x, y, z;
while (in >> label >> x >> y >> z)
{
points.push_back(My3DPoint(x, y, z)); // Add it to our collection.
}

// Now print the collection (in reverse order for fun):
typedef My3DPoints::reverse_iterator RI; // To save some typing.
for ( RI i=points.rbegin(); i!=points.rend(); ++i )
{
const My3DPoint &pt = *i;
cout << "(" << pt.x << ", " << pt.y << ", " << pt.z << ")\n";
}

return 0;
}

Steve

etm12425-Apr-06 14:55

Favorites Icon using IWebBrowser2 control

25-Apr-06 14:55

you've got email Steve.

achimera25-Apr-06 13:08

achimera

25-Apr-06 13:08

I'm developing a browser using my own version of something simular to MFC's CHtmlView control. I've got all the good stuff in place - a pointer to IWebBrowser2, various event sinks, etc.

What I would like to know is, after (or during) the web browser control navigates to a page -- how can I determine what (if any) the "Favorites Icon" is for that page?

I know that I can look for favicon.ico at the location, or I can manually parse the HTML to look for it specified there, however I have to assume Microsoft has exposed some sort of COM interface that allows me to grab this icon without going through all that drudgery.

Does anyone know how I can do it? I'm not looking for exact instructions, I would just appreciate a pointer (no pun intended) to some sort of interface or any other bit of information to set me in the correct direction.

Thanks!

Re: Favorites Icon using IWebBrowser2 control [modified]

code-frog25-Apr-06 17:09

code-frog

25-Apr-06 17:09

Haven't tried it and don't know if it will work but the path I would head down is below. Keep in mind I've never done this and have not worked in C/C++ for a while and when I did it wasn't web related.

I'd call CHttpRequest::GetURL[^] and I would try to get "http://www.websiteofinterest.com/favorite.ico" if true you are good if false handle it and try something else. I have not tested this nor do I know if it will work but it should without any trouble.

MODIFIED: That actually doesn't look like the right function to use. I think that's a server-side call you would make. In theory my idea holds find the right function and you should be good to go.

The enemy's gate is down. Cool | :cool:

Welcome to CP in your language. Post the unicode version in My CP Blog[^] now.

People who don't understand how awesome Firefox is have never used CPhog. The act of using CPhog alone doesn't make Firefox cool. It opens your eyes to the possibilities and then you start looking for other things like CPhog and your eyes are suddenly open to all sorts of useful things all through Firefox. - (Self Quote)

Last modified: Tuesday, April 25, 2006 10:11:18 PM --

achimera25-Apr-06 17:32

achimera

25-Apr-06 17:32

I bow down to the code-frog for responding :bow down:, but unfortunately that's not exactly what I'm looking for.

I already know how to get favicon.ico using WinInet (or whatever).

The thing is that the spanky way to specify a favorite icon for a site is to insert it's reference into the HTML. So looking for favicon.ico doesn't necessarily work. I know how to parse the HTML to find this info, but that's a lot of work - especially since it should already be available via a COM interface at my fingertips.

IE exposes practically everything via COM interfaces... so there has to be something to figure out what the Favorites Icon is for a particular web page (isn't there???)...

Or am I just asking questions without answers?

code-frog25-Apr-06 17:41

code-frog

25-Apr-06 17:41

chimera67 wrote:
Or am I just asking questions without answers?

Oh I believe there's an answer alright I'm just not sure it's a "documented" answer. I reread your post and with your follow-up comments it makes more sense. Unfortunately, I don't have an answer for it. I'd find the object model for I.E. and start looking.

This looks interesting Microsoft[^] and in that link the "Associated Browser Reference" looks good. I'm sure you have seen both of these but that's about as far as I can go. I've got a super tight deadline for the morning.

- Rex

The enemy's gate is down. Cool | :cool:

achimera25-Apr-06 18:05

achimera

25-Apr-06 18:05

K, thanks. Perhaps Microsoft actually didn't create a documented method to figure out the favorite icon for a web page. Frown | :(

Seems strange that they didn't, but perhaps it is true and everything has to be done the hard way.